wehub-resource-sync
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
/* Copyright 2021 The TensorFlow Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
==============================================================================*/
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include <string>
|
|
#include <utility>
|
|
|
|
#include "tensorflow/lite/core/c/builtin_op_data.h"
|
|
#include "tensorflow/lite/core/c/common.h"
|
|
#include "tensorflow/lite/core/subgraph.h"
|
|
#include "tensorflow/lite/experimental/resource/resource_variable.h"
|
|
#include "tensorflow/lite/kernels/internal/tensor.h"
|
|
#include "tensorflow/lite/kernels/kernel_util.h"
|
|
|
|
namespace tflite {
|
|
namespace ops {
|
|
namespace builtin {
|
|
namespace var_handle {
|
|
// Util struct with params that identifies the resource.
|
|
struct VarParams {
|
|
int resource_id;
|
|
};
|
|
|
|
void* Init(TfLiteContext* context, const char* buffer, size_t length) {
|
|
const auto* var_params =
|
|
reinterpret_cast<const TfLiteVarHandleParams*>(buffer);
|
|
VarParams* params = new VarParams;
|
|
auto* subgraph = reinterpret_cast<Subgraph*>(context->impl_);
|
|
// Create a new entry if doesn't exist, return the existing one otherwise.
|
|
auto it = subgraph->resource_ids().insert(std::make_pair(
|
|
std::make_pair(
|
|
std::string(var_params->container ? var_params->container : ""),
|
|
std::string(var_params->shared_name ? var_params->shared_name : "")),
|
|
static_cast<int>(subgraph->resource_ids().size())));
|
|
params->resource_id = it.first->second;
|
|
return params;
|
|
}
|
|
|
|
void Free(TfLiteContext* context, void* buffer) {
|
|
delete reinterpret_cast<VarParams*>(buffer);
|
|
}
|
|
|
|
TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
|
|
TfLiteTensor* output;
|
|
TF_LITE_ENSURE_OK(context, GetOutputSafe(context, node, 0, &output));
|
|
|
|
output->allocation_type = kTfLiteArenaRwPersistent;
|
|
const int kBytesRequired = sizeof(int32_t);
|
|
TfLiteTensorRealloc(kBytesRequired, output);
|
|
output->bytes = kBytesRequired;
|
|
|
|
return kTfLiteOk;
|
|
}
|
|
|
|
TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
|
|
auto* op_data = static_cast<VarParams*>(node->user_data);
|
|
TF_LITE_ENSURE(context, op_data != nullptr);
|
|
|
|
TfLiteTensor* output;
|
|
TF_LITE_ENSURE_OK(context, GetOutputSafe(context, node, 0, &output));
|
|
|
|
memcpy(output->data.raw, reinterpret_cast<char*>(&op_data->resource_id),
|
|
sizeof(op_data->resource_id));
|
|
return kTfLiteOk;
|
|
}
|
|
|
|
} // namespace var_handle
|
|
|
|
TfLiteRegistration* Register_VAR_HANDLE() {
|
|
static TfLiteRegistration r = {var_handle::Init, var_handle::Free,
|
|
var_handle::Prepare, var_handle::Eval};
|
|
return &r;
|
|
}
|
|
|
|
} // namespace builtin
|
|
} // namespace ops
|
|
} // namespace tflite
|